Oki 80 Series - Manual (Page 63)

Troubleshooting 63
Problem
Ink smears on the paper when I print narrow columns.
Solution
This may be caused by excessive printhead travel from the
centering position. Enter the Menu and set the Centering
Position to MODE 1. See “Using Your Printer, Menu Mode.”
For the wide-carriage printer, if MODE 1 doesn't work, try
setting the Centering Position to MODE 2.
Problem
I've installed a new ribbon and the printing is smeared and
streaked.
Solution
The ribbon shield (1) is either loose or missing.
Remove the ribbon cartridge and check the ribbon shield.
• If it is loose, secure it.
• If it is missing, find it and install it.